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Finding the Fourth Proportional to 2,131.55, 3,197.33 and 744.51

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Solution

The fourth proportional to 2,131.55, 3,197.33 and 744.51 is: 1,116.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.55 : 3,197.33 = 744.51 : x
  2. Step 2: Convert to fraction form
    2,131.55/3,197.33 = 744.51/x
  3. Step 3: Cross multiply
    2,131.55x = 3,197.33 × 744.51
  4. Step 4: Simplify right side
    2,131.55x = 2,380,440.44
  5. Step 5: Solve for x
    x = 2,380,440.44/2,131.55
  6. Step 6: Final answer
    x = 1,116.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.